-/* Copyright (c) 2008-2018. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2008-2019. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include <unistd.h>
-#include <cstring>
-#include <dirent.h>
-#include <fcntl.h>
-#include <link.h>
-
#ifndef WIN32
#include <sys/mman.h>
#endif
#include "src/mc/mc_hash.hpp"
#include "src/mc/mc_mmu.hpp"
#include "src/mc/mc_smx.hpp"
-#include "src/mc/mc_unw.hpp"
#include "src/mc/remote/mc_protocol.h"
#include "src/mc/sosp/mc_snapshot.hpp"
-#include "src/mc/Frame.hpp"
-#include "src/mc/ObjectInformation.hpp"
-#include "src/mc/Variable.hpp"
#include "src/mc/sosp/RegionSnapshot.hpp"
using simgrid::mc::remote;
*
* @param region Target region
*/
-static void restore(mc_mem_region_t region)
+static void restore(RegionSnapshot* region)
{
switch (region->storage_type()) {
case simgrid::mc::StorageType::Flat:
break;
case simgrid::mc::StorageType::Chunked:
- mc_region_restore_sparse(&mc_model_checker->process(), region);
+ xbt_assert(((region->permanent_address().address()) & (xbt_pagesize - 1)) == 0, "Not at the beginning of a page");
+ xbt_assert(simgrid::mc::mmu::chunk_count(region->size()) == region->page_data().page_count());
+
+ for (size_t i = 0; i != region->page_data().page_count(); ++i) {
+ void* target_page =
+ (void*)simgrid::mc::mmu::join(i, (std::uintptr_t)(void*)region->permanent_address().address());
+ const void* source_page = region->page_data().page(i);
+ mc_model_checker->process().write_bytes(source_page, xbt_pagesize, remote(target_page));
+ }
+
break;
case simgrid::mc::StorageType::Privatized:
mc_model_checker->process().read_bytes(&privatization_regions, sizeof(privatization_regions),
remote(remote_smpi_privatization_regions));
- std::vector<simgrid::mc::RegionSnapshot> data;
+ std::vector<RegionSnapshot> data;
data.reserve(process_count);
for (size_t i = 0; i < process_count; i++)
- data.push_back(simgrid::mc::region(region_type, start_addr, privatization_regions[i].address, size));
+ data.push_back(region(region_type, start_addr, privatization_regions[i].address, size));
- simgrid::mc::RegionSnapshot region = simgrid::mc::RegionSnapshot(region_type, start_addr, permanent_addr, size);
+ RegionSnapshot region = RegionSnapshot(region_type, start_addr, permanent_addr, size);
region.privatized_data(std::move(data));
return region;
}
#endif
-static void add_region(int index, simgrid::mc::Snapshot* snapshot, simgrid::mc::RegionType type,
- simgrid::mc::ObjectInformation* object_info, void* start_addr, void* permanent_addr,
- std::size_t size)
-{
- if (type == simgrid::mc::RegionType::Data)
- xbt_assert(object_info, "Missing object info for object.");
- else if (type == simgrid::mc::RegionType::Heap)
- xbt_assert(not object_info, "Unexpected object info for heap region.");
-
- simgrid::mc::RegionSnapshot region;
-#if HAVE_SMPI
- const bool privatization_aware = object_info && mc_model_checker->process().privatized(*object_info);
- if (privatization_aware && MC_smpi_process_count())
- region = simgrid::mc::privatized_region(type, start_addr, permanent_addr, size);
- else
-#endif
- region = simgrid::mc::region(type, start_addr, permanent_addr, size);
-
- region.object_info(object_info);
- snapshot->snapshot_regions[index] =
- std::unique_ptr<simgrid::mc::RegionSnapshot>(new simgrid::mc::RegionSnapshot(std::move(region)));
-}
-
static void get_memory_regions(simgrid::mc::RemoteClient* process, simgrid::mc::Snapshot* snapshot)
{
- const size_t n = process->object_infos.size();
- snapshot->snapshot_regions.resize(n + 1);
- int i = 0;
+ snapshot->snapshot_regions_.clear();
+
for (auto const& object_info : process->object_infos)
- add_region(i++, snapshot, simgrid::mc::RegionType::Data, object_info.get(), object_info->start_rw,
- object_info->start_rw, object_info->end_rw - object_info->start_rw);
+ snapshot->add_region(simgrid::mc::RegionType::Data, object_info.get(), object_info->start_rw, object_info->start_rw,
+ object_info->end_rw - object_info->start_rw);
xbt_mheap_t heap = process->get_heap();
void* start_heap = heap->base;
void* end_heap = heap->breakval;
- add_region(n, snapshot, simgrid::mc::RegionType::Heap, nullptr, start_heap, start_heap,
- (char*)end_heap - (char*)start_heap);
- snapshot->heap_bytes_used = mmalloc_get_bytes_used_remote(heap->heaplimit, process->get_malloc_info());
+ snapshot->add_region(simgrid::mc::RegionType::Heap, nullptr, start_heap, start_heap,
+ (char*)end_heap - (char*)start_heap);
+ snapshot->heap_bytes_used_ = mmalloc_get_bytes_used_remote(heap->heaplimit, process->get_malloc_info());
#if HAVE_SMPI
if (mc_model_checker->process().privatized() && MC_smpi_process_count())
// snapshot->privatization_index = smpi_loaded_page
- mc_model_checker->process().read_variable("smpi_loaded_page", &snapshot->privatization_index,
- sizeof(snapshot->privatization_index));
+ mc_model_checker->process().read_variable("smpi_loaded_page", &snapshot->privatization_index_,
+ sizeof(snapshot->privatization_index_));
else
#endif
- snapshot->privatization_index = simgrid::mc::ProcessIndexMissing;
+ snapshot->privatization_index_ = simgrid::mc::ProcessIndexMissing;
}
-/** \brief Fills the position of the segments (executable, read-only, read/write).
+/** @brief Fills the position of the segments (executable, read-only, read/write).
* */
// TODO, use the ELF segment information for more robustness
void find_object_address(std::vector<simgrid::xbt::VmMap> const& maps, simgrid::mc::ObjectInformation* result)
/************************************* Take Snapshot ************************************/
/****************************************************************************************/
-/** \brief Checks whether the variable is in scope for a given IP.
+/** @brief Checks whether the variable is in scope for a given IP.
*
* A variable may be defined only from a given value of IP.
*
- * \param var Variable description
- * \param scope Scope description
- * \param ip Instruction pointer
- * \return true if the variable is valid
+ * @param var Variable description
+ * @param scope Scope description
+ * @param ip Instruction pointer
+ * @return true if the variable is valid
* */
static bool valid_variable(simgrid::mc::Variable* var, simgrid::mc::Frame* scope, const void* ip)
{
result.push_back(std::move(stack_frame));
/* Stop before context switch with maestro */
- if (frame != nullptr && frame->name == "smx_ctx_sysv_wrapper")
+ if (frame != nullptr && frame->name == "smx_ctx_wrapper")
break;
int ret = unw_step(&c);
xbt_die("Error while unwinding stack");
}
- if (result.empty()) {
- XBT_INFO("unw_init_local failed");
- xbt_abort();
- }
+ xbt_assert(not result.empty(), "unw_init_local failed");
return result;
}
-static std::vector<s_mc_snapshot_stack_t> take_snapshot_stacks(simgrid::mc::Snapshot* snapshot)
+static void take_snapshot_stacks(simgrid::mc::Snapshot* snapshot)
{
- std::vector<s_mc_snapshot_stack_t> res;
-
for (auto const& stack : mc_model_checker->process().stack_areas()) {
s_mc_snapshot_stack_t st;
unw_word_t sp = st.stack_frames[0].sp;
- res.push_back(std::move(st));
+ snapshot->stacks_.push_back(std::move(st));
size_t stack_size = (char*)stack.address + stack.size - (char*)sp;
- snapshot->stack_sizes.push_back(stack_size);
+ snapshot->stack_sizes_.push_back(stack_size);
}
-
- return res;
}
static void snapshot_handle_ignore(simgrid::mc::Snapshot* snapshot)
// TODO, we should do this once per privatization segment:
snapshot->process()->read_bytes(ignored_data.data.data(), region.size, remote(region.addr),
simgrid::mc::ProcessIndexDisabled);
- snapshot->ignored_data.push_back(std::move(ignored_data));
+ snapshot->ignored_data_.push_back(std::move(ignored_data));
}
// Zero the memory:
static void snapshot_ignore_restore(simgrid::mc::Snapshot* snapshot)
{
- for (auto const& ignored_data : snapshot->ignored_data)
+ for (auto const& ignored_data : snapshot->ignored_data_)
snapshot->process()->write_bytes(ignored_data.data.data(), ignored_data.data.size(), remote(ignored_data.start));
}
-static std::vector<s_fd_infos_t> get_current_fds(pid_t pid)
-{
- const size_t fd_dir_path_size = 20;
- char fd_dir_path[fd_dir_path_size];
- int res = snprintf(fd_dir_path, fd_dir_path_size, "/proc/%lli/fd", (long long int)pid);
- xbt_assert(res >= 0);
- if ((size_t)res > fd_dir_path_size)
- xbt_die("Unexpected buffer is too small for fd_dir_path");
-
- DIR* fd_dir = opendir(fd_dir_path);
- if (fd_dir == nullptr)
- xbt_die("Cannot open directory '/proc/self/fd'\n");
-
- std::vector<s_fd_infos_t> fds;
-
- struct dirent* fd_number;
- while ((fd_number = readdir(fd_dir))) {
-
- int fd_value = xbt_str_parse_int(fd_number->d_name, "Found a non-numerical FD: %s. Freaking out!");
-
- if (fd_value < 3)
- continue;
-
- const size_t source_size = 25;
- char source[25];
- int res = snprintf(source, source_size, "/proc/%lli/fd/%s", (long long int)pid, fd_number->d_name);
- xbt_assert(res >= 0);
- if ((size_t)res > source_size)
- xbt_die("Unexpected buffer is too small for fd %s", fd_number->d_name);
-
- const size_t link_size = 200;
- char link[200];
- res = readlink(source, link, link_size);
-
- if (res < 0)
- xbt_die("Could not read link for %s", source);
- if (res == 200)
- xbt_die("Buffer to small for link of %s", source);
-
- link[res] = '\0';
-
-#if HAVE_SMPI
- if (smpi_is_privatization_file(link))
- continue;
-#endif
-
- // This is (probably) the DIR* we are reading:
- // TODO, read all the file entries at once and close the DIR.*
- if (strcmp(fd_dir_path, link) == 0)
- continue;
-
- // We don't handle them.
- // It does not mean we should silently ignore them however.
- if (strncmp(link, "pipe:", std::strlen("pipe:")) == 0 || strncmp(link, "socket:", std::strlen("socket:")) == 0)
- continue;
-
- // If dot_output enabled, do not handle the corresponding file
- if (dot_output != nullptr) {
- std::string link_basename = simgrid::xbt::Path(link).get_base_name();
- if (link_basename == _sg_mc_dot_output_file.get())
- continue;
- }
-
- // This is probably a shared memory used by lttng-ust:
- if (strncmp("/dev/shm/ust-shm-tmp-", link, std::strlen("/dev/shm/ust-shm-tmp-")) == 0)
- continue;
-
- // Add an entry for this FD in the snapshot:
- s_fd_infos_t fd;
- fd.filename = std::string(link);
- fd.number = fd_value;
- fd.flags = fcntl(fd_value, F_GETFL) | fcntl(fd_value, F_GETFD);
- fd.current_position = lseek(fd_value, 0, SEEK_CUR);
- fds.push_back(std::move(fd));
- }
-
- closedir(fd_dir);
- return fds;
-}
-
std::shared_ptr<simgrid::mc::Snapshot> take_snapshot(int num_state)
{
XBT_DEBUG("Taking snapshot %i", num_state);
std::shared_ptr<simgrid::mc::Snapshot> snapshot = std::make_shared<simgrid::mc::Snapshot>(mc_process, num_state);
for (auto const& p : mc_model_checker->process().actors())
- snapshot->enabled_processes.insert(p.copy.getBuffer()->pid_);
+ snapshot->enabled_processes_.insert(p.copy.getBuffer()->get_pid());
snapshot_handle_ignore(snapshot.get());
- if (_sg_mc_snapshot_fds)
- snapshot->current_fds = get_current_fds(mc_model_checker->process().pid());
-
/* Save the std heap and the writable mapped pages of libsimgrid and binary */
get_memory_regions(mc_process, snapshot.get());
- snapshot->to_ignore = mc_model_checker->process().ignored_heap();
+ snapshot->to_ignore_ = mc_model_checker->process().ignored_heap();
if (_sg_mc_max_visited_states > 0 || not _sg_mc_property_file.get().empty()) {
- snapshot->stacks = take_snapshot_stacks(snapshot.get());
+ take_snapshot_stacks(snapshot.get());
if (_sg_mc_hash)
- snapshot->hash = simgrid::mc::hash(*snapshot);
- else
- snapshot->hash = 0;
- } else
- snapshot->hash = 0;
+ snapshot->hash_ = simgrid::mc::hash(*snapshot);
+ }
snapshot_ignore_restore(snapshot.get());
return snapshot;
static inline void restore_snapshot_regions(simgrid::mc::Snapshot* snapshot)
{
- for (std::unique_ptr<s_mc_mem_region_t> const& region : snapshot->snapshot_regions) {
+ for (std::unique_ptr<simgrid::mc::RegionSnapshot> const& region : snapshot->snapshot_regions_) {
// For privatized, variables we decided it was not necessary to take the snapshot:
if (region)
restore(region.get());
}
#if HAVE_SMPI
- if (snapshot->privatization_index >= 0) {
+ if (snapshot->privatization_index_ >= 0) {
// Fix the privatization mmap:
- s_mc_message_restore_t message{MC_MESSAGE_RESTORE, snapshot->privatization_index};
+ s_mc_message_restore_t message{MC_MESSAGE_RESTORE, snapshot->privatization_index_};
mc_model_checker->process().getChannel().send(message);
}
#endif
}
-static inline void restore_snapshot_fds(simgrid::mc::Snapshot* snapshot)
-{
- xbt_die("FD snapshot not implemented in client/server mode.");
-
- for (auto const& fd : snapshot->current_fds) {
-
- int new_fd = open(fd.filename.c_str(), fd.flags);
- if (new_fd < 0)
- xbt_die("Could not reopen the file %s fo restoring the file descriptor", fd.filename.c_str());
- if (new_fd != fd.number) {
- dup2(new_fd, fd.number);
- close(new_fd);
- }
- lseek(fd.number, fd.current_position, SEEK_SET);
- }
-}
-
void restore_snapshot(std::shared_ptr<simgrid::mc::Snapshot> snapshot)
{
- XBT_DEBUG("Restore snapshot %i", snapshot->num_state);
+ XBT_DEBUG("Restore snapshot %i", snapshot->num_state_);
restore_snapshot_regions(snapshot.get());
- if (_sg_mc_snapshot_fds)
- restore_snapshot_fds(snapshot.get());
snapshot_ignore_restore(snapshot.get());
mc_model_checker->process().clear_cache();
}
